Paper pulley.



W. D. HAMERSTADT.

PAPER PULLEY.

APPLICATION HLED JAN-17,1916.

1,223,165. Patented Apr. 17, 1917.

' v 2 SHEETS-SHEIFT A TTOR/VEV W. D. HAMERSTADT.

PAPER PULLEY.

APPLICATION FILED IAN-17.!9l6.

1,223,165. Patented Apr. 17,1917.

2 SHEETSSHEET 2.

A TTORNEVS STA as PATENT WILLIAM ID. HAMERSTADT, INDIANAPOLIS, INDIANA.

PAPER PULLEY.

Specification of Letters Patent. Patented Apr. 17, 1917- Application filed January 17, 1916. Serial No. 72,511.

- ed a certain new and useful Paper Pulley;

and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like characters refer to like parts.

The object of this invention is to cheapen materially the cost of manufacturing fibrous pulleys, to render the same of light weight, accurate in fitting, and durable, and to make the rim a positive drive, to enable various forms thereof, such as split pulleys and clamp hub pulleys, to be readily made, and to render both sides of the pulley hub readily accessible, in fitting to shafts, or machines.

One feature of the invention consists in dispensing with the paper web heretofore usually found in paper pulleys and instead using the paper only as the rim, and securing it on a metal spider or huband spokes, and providing transverse pins integral with the outer ends of the spokes on which the paper rim is secured. The pulley is very strong as all but the paper I'lIIl is integral metal and the power is transmitted from the hub through the metal spokes and metal pins to the paper rim without any loss, making the pulley extremely strong and durable. The rim can be held together by pins independently of the pins on the spokes or arms.

Such a form of pulley is light, durable and has a high tractive coefi icient, and one can put his hand through the pulley for tightening a set screw on the other side of the pulley, as both sides are accessible. It is also easy in such way to make a split pulley or a clamp hub pulley, and it is adapted for convenient use in more situations than pulleys with the paper web as usually made.

The full nature of this invention will be understood from the accompanying drawings and the following description and claims:

In the drawings, Figure 1 is a side elevation of the pulley. Fig. 2 is a' section on the line 22 thereof. Fig. 3 is a longitudinal section of a modified form of the pulley. Fig. 4. is a side elevation of another modified form. Fig. 5 is a side elevation of still another modified form with parts in section.

Fig. '6 is a section on line 6-6 of Fig. 5. Fig. 7 is a side elevation of a split pulley. Fig. 8 is a section on line 8-8 of Fig. 7.

In Fig. 1 there is shown a simple structure having a hub 10, arms or spokes 11, and cross pins 12 on the ends of the said arms or spokes. These parts are all integral. The

rim 13 is made of paper rings secured on the pins 12.. The width of the rim usually ex ceeds the length of said cross pins 12. Therefore, the usual binding pins 14 are employed, extending entirely through the rim and located between the ends of the spokes or arms 11. When a short pin 12 is used, as shown in Fig. 1, a plug 15 may be inserted in the hole in the rim which lies'beyond the pin 12. The number of pins 14: may be such as desired.

It is thus seen that the central part of the pulley is spider-like so that it is light, and both sides are accessible through the spaces between the spokes. Often a web paper pulley is located on machinery where one side of the pulley is utterly inaccessible on account of adjacent machinery. Here, however, one can reach through the pulley to adjust a set screw or for any other purpose. This pulley is strong because the hub spokes and pins 12 are integral and the power transmitted directly therefrom to the rim and not through the paper web as heretofore.

In Fig. 3, the same form of pulley is formed excepting that it is longer and has two sets of spokes or arms 11, and longer pins 12 and two plugs 15. This construction is suitable for long pulleys and no web is employed and the pulley is therefore interiorly accessible, and lighter.

Fig. 4 shows a clamp hub pulley, the

hub 10 being split so as to be clamped on the shaft by bolts 16 which extends through a.

couple of projecting ears 17 on the hub adj acent the two sides of the split thereof.

In Figs. 5 and 6 there is shown a modified form wherein the hub 10 is very large and the spokes or arms 11 are very short, but otherwise this is substantially the same in construction as that in Fig. 1. This is suitable for pulleys of reduced diameter.

Figs. 7 and 8 show a split pulley, each part consisting of one half of the hub having an equal number of spokes, and two of the spokes on each half are adjacent the split surface thereof and are clamped together by bolts 20. In making this type of pulley, the two halves of the inner portion can be prepared and united, and then the rim be formed thereon, and the pulley split to make the two halves of the pulley, which can be bolted together by the bolts 20, when desired.

The invention claimed is:

1. A pulley consisting of a hub portion with radial arms having transverse pins rigidly secured on the outer ends of said arms and extending radially beyond the end of said arms, and a paper rim portion secured on said pins.

2. A pulley including a hub portion With radial arms having pins rigidly secured on the outer ends of said arms, and a paper rim portion secured on said pins, and pins extending through said rim between said other pins, and not connected with the hub portion.

3. A pulley including a spider-like hub portion with pins secured to the outer ends of the arms thereof, and extending transversely of the pulley, a paper rim secured on said pins, and pins extending transversely through said rim independently of said spider-like hub portion and located at the same distance from the center of the pulley as the other pins.

4. A pulley including a hub, radial arms secured thereto, transverse pins secured to the ends of the arms, 'a paper rim secured on said pins and having a width greater than the length of the pins, and independent binding pins extending through said arm. 5. A pulley including a hub, radial arms secured thereto, transverse pins secured to the ends of the arms, a paper rim secured on said pins and having a width greater than the length of the pins, leaving'holes in the rim at the ends of the pins, plugs filling the outer ends of the holes in the rim in which said pinsare located, and binding pins ex tending entirely through said rim at the same distance from thecenter of the pulley as the other pins and independent of the arms thereof connected with the hub.

In Witness whereof, Ihave'hereunto affixed my signature.

WILLIAM D. HAMERSTADT.

Copies of this patent may be obtained for five cents each, by addressing:the"( ommissioner of Patents, Washington, D. G. 

